Cathode



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INVENTOR. Biaszus Bar?- ATTORNEY.

B. B'ART Feb. 4, 1930.

GATHODE Filed Dec. 11, 1925 Titrl- Fig.2.

I 10 portions of the Patented Feb. 4, 1930 UNITED STATES PATENT OFFICE BLLSIUS BART, OF'EAST ORANGE, NEW JERSEY, ASSIGNOR TO BART REFLECTOR CO. INC., OI NEWARK, NEW JERSEY, A CORPORATION 01' NEW JERSEY eurnonn Application filedDecember 11, ms. Serial 1T0. 'wm.

The invention relates to 'a cathode comprising a mold and a holder therefor for use in an electrolytic bath where a metallic coat ing is formed on the mold.

5 The invention particularly relates to a holder for supporting a flanged mold of the t pe usually used for forming parabolic anged reflectors and which holders are constructed for stopping off the deposit from mold.

The primary object of the invention is to provide a simple form of cathode of the type outlined by the use of which flanged reflectors and other forms of tridimensional objects 5 may be formed economically and in which the mold may be readily mounted and demounted from its associated parts.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying the invention, and the invention also consists in certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

In the accompanying drawing:

Fig. 1' is a view largely in diagrammatic outline of an electrolytic tank mounted in which is a cathode constituting a preferred embodiment of the invention; and

Fig. 2 is a perspective view of a metallic reflector constituting a product produced on the cathode shown in Fig. 1.

In the drawing, there is shown an electrolytic tank in which is contained a suitable electrolyte 11. There are contained in the tank the usual anodes 12 which may be and are of course of the same metal as is contained in the electrolyte. The cathode element includes a hanger 13 suspended from a shaft 14 constituting a.source of negative electric energy. The lower end of the hanger is L- shaped with'a horizontally extending limb 15 thereof threaded. Loosely positioned on the limb 15 is ,a circular frame 16 formed of insulating material and having on one side a shallow recess or pocket 17, circular in outline. 50 This frame 16 acts as a shield to stop off the deposition on the flanged side of the mold. Fitted in this recess is the flange 18 of a mold 19 shown to be of solid metal and provided with a threaded aperture for engaging the limb 15. The parts are so disposed that the mold may be rotated on the limb 15 so as to secure the mold to the hanger and with the insulating frame clamped between the mold and the hanger. The mold has a parabolic deposit receiving surface 20 with a configuration, the complement of the configuration of the reflecting surface 21 of the parabolic reflector 22 shown in Fig. 2.

In operation, it is understood that thg device functions as is usual in such constructions, the deposit being formed on the exposed surface 20 of the mold and on .its flange while the insulating frame 16 acts to stop off the formation of any deposit on the flat side of the mold. v 7

Having thus described my invention, I claim 1. In an electrolytic bath for forming flanged metallic reflectors, a cathode includin a one-piece metallic mold provided with 7: a flange and means for stopping or the deosit from one side ofthe mold, said means including a flat disk forextending across the flanged SldG'Of the mold and provided with a recess for receiving the mold flange.

2. In an electrolytic bath, a cathode comprising a hanger, a metal mold threaded thereto and means for stopping off the deposit on a part of the mold, said means being clamped between the hanger and the mold. 85

- Signed at New York, in the county of New York and State of New York, this tenth day of December, A. D. 1925.

v BLASIUS BART. 

